/**  
* Copyright (c) 2009, Noel Lynch All rights reserved. Redistribution and use  
* in source and binary forms, with or without modification, are permitted  
* provided that the following conditions are met: Redistributions of source  
* code must retain the above copyright notice, this list of conditions and the  
* following disclaimer. Redistributions in binary form must reproduce the above  
* copyright notice, this list of conditions and the following disclaimer in the  
* documentation and/or other materials provided with the distribution. Neither  
* the name of Noel Lynch nor the names of contributors may be used to  
* endorse or promote products derived from this software without specific prior  
* written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT  
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A  
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR  
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,  
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,  
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;  
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,  
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR  
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF  
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
*/
// created by noellynch
// Sep 25, 2009

package com.sceneworker.editors.texturepainter.brushgenerator;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import java.awt.geom.Point2D;

import javax.swing.JComponent;

import com.myjavautils.math.MathUtils;
import com.myjavautils.swing.DrawUtils;

public class BrushSpectrumUI extends JComponent implements IQuadraticBrushSpectrum {

	private		Point2D		mcl_ctrl = null;
	private		Point2D		mcl_ptA = null;
	private		Point2D		mcl_ptB = null;
	
	private		int				mi_samples = 10;
	
	private		boolean		mb_drag;
	
	private		Rectangle		mcl_area;
	private		Rectangle		mcl_clickDim = new Rectangle(0, 0, 4, 4);
	
	
	
	public	BrushSpectrumUI() {
		this.addComponentListener(new ComponentListener() {
			public void componentHidden(ComponentEvent e) {
			}

			public void componentMoved(ComponentEvent e) {
			}

			public void componentResized(ComponentEvent e) {
				mcl_ptA = new Point2D.Double(300, 300);
				mcl_ptB = new Point2D.Double(400, 400);
				mcl_ctrl = new Point2D.Double(350, 350);
				mcl_area = new Rectangle(10, 10, getWidth() - 50, getHeight() - 50);
			}

			public void componentShown(ComponentEvent e) {
			}
			
		});
		
		this.addMouseListener(new MouseAdapter() {

			@Override
			public void mousePressed(MouseEvent e) {
				mcl_clickDim.x = (int)mcl_ctrl.getX();
				mcl_clickDim.y = (int)mcl_ctrl.getY();
				if(mcl_clickDim.contains(e.getPoint())) {
					mb_drag = true;
				}
				
			}

			@Override
			public void mouseReleased(MouseEvent e) {
				mb_drag = false;
			}
		});
		
		this.addMouseMotionListener(new MouseMotionListener() {
			public void mouseDragged(MouseEvent cl_e) {
				if(mb_drag) {
					if(mcl_area.contains(cl_e.getPoint())) {
						mcl_ctrl.setLocation(cl_e.getPoint().getX(), cl_e.getPoint().getY());
						repaint();
					}
				}
			}

			public void mouseMoved(MouseEvent e) {
			}
			
		});
	}
	
	
	/* (non-Javadoc)
	 * @see com.sceneworker.editors.texturepainter.brushgenerator.IBrushSpectrum#getSamples()
	 */
	public	int		getSamples() {
		return mi_samples;
	}
	
	/* (non-Javadoc)
	 * @see com.sceneworker.editors.texturepainter.brushgenerator.IBrushSpectrum#setSamples(int)
	 */
	public	void	setSamples(int i_s) {
		mi_samples = i_s;
	}
	
	public	boolean		isDragging() {
		return mb_drag;
	}
	
	/* (non-Javadoc)
	 * @see com.sceneworker.editors.texturepainter.brushgenerator.IBrushSpectrum#sampleAtX(double)
	 */
	public	double	sampleAtX(double f_x) {
		if(mcl_ptA == null) {
			return 0;
		}
		
		double	lf_d = MathUtils.quadraticBezierCurve(mcl_ptA.getX(), mcl_ctrl.getX(), mcl_ptB.getX(), f_x);
		double	lf_total = mcl_ptB.getX() - mcl_ptA.getX();
		return (lf_d - mcl_ptA.getX()) / lf_total;
	}
	
	@Override
	protected void paintComponent(Graphics cl_g) {
		/*if(mcl_ptA == null) {
			mcl_ptA = new Point2D.Double(getWidth() >> 2, getHeight() >> 2);
			mcl_ptB = new Point2D.Double(mcl_ptA.getX() + (getWidth() >> 1), mcl_ptA.getY() + (getHeight() >> 1));
			mcl_ctrl = new Point2D.Double(getWidth() >> 1, getHeight() >> 1);
			mcl_area = new Rectangle(10, 10, getWidth() - 50, getHeight() - 50);
		}*/
		
		Graphics2D		lcl_g = (Graphics2D)cl_g.create();
		
		lcl_g.setColor(Color.white);
		DrawUtils.fillComponentRect(lcl_g, this);
		
		lcl_g.setColor(Color.black);
		lcl_g.draw(mcl_area);
		lcl_g.setColor(Color.blue);
		
		Point			lcl_draw1 = new Point(0, 0);
		Point			lcl_draw2 = new Point();
		
		double	lf_d = mcl_ptB.getY() - mcl_ptA.getY();
		double	lf_tD;
		double	lf_yD;
		int		li_y = 10;
		Color		lcl_clr;
		int			li_newcolor;
		MathUtils.quadraticBezierCurve(mcl_ptA, mcl_ctrl, mcl_ptB, 0, lcl_draw1);
		
		float		lf_sampleDelta = 1.0f / (float)mi_samples;
		for(int li_i = 1; li_i <= mi_samples; li_i++) {
			MathUtils.quadraticBezierCurve(mcl_ptA, mcl_ctrl, mcl_ptB, lf_sampleDelta * li_i, lcl_draw2);
			
			lf_yD = lcl_draw2.getY() - mcl_ptA.getY();
			lf_tD =  (mcl_ptB.getY() - lcl_draw2.getY()) / lf_d;
			
			lcl_clr = lcl_g.getColor();
			li_newcolor = (int)(lf_tD * 255);
			
			if(li_newcolor > 255) {
				li_newcolor = 255;
			} else if(li_newcolor < 0){
				li_newcolor = 0;
			}
			
			lcl_g.setColor(new Color(li_newcolor, li_newcolor, li_newcolor));
			lcl_g.fillRect(getWidth() - 35, (int)lcl_draw1.getY(), 25, (int)(lcl_draw2.getY() - lcl_draw1.getY()));
			
			lcl_g.setColor(lcl_clr);
			
			DrawUtils.drawLine(lcl_g, lcl_draw1, lcl_draw2);
			lcl_draw1.setLocation(lcl_draw2);
		}
		
		lcl_g.setColor(Color.red);
		DrawUtils.drawPoint(lcl_g, mcl_ctrl, 4);
		
		lcl_g.dispose();
	}


	public Point2D getControlPoint() {
		return mcl_ctrl;
	}
	
}
